气候变化领域集成服务门户(CCPortal): Landslide-dammed paleolake perturbs marine sedimentation and drives genetic change in anadromous fish

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DOI	10.1073/pnas.1110445108
	Landslide-dammed paleolake perturbs marine sedimentation and drives genetic change in anadromous fish
	Mackey B.H.; Roering J.J.; Lamb M.P.
发表日期	2011
ISSN	0027-8424
起始页码	18905
结束页码	18909
卷号	108 期号:47
英文摘要	Large bedrock landslides have been shown to modulate rates and processes of river activity by forming dams, forcing upstream aggradation of water and sediment, and generating catastrophic outburst floods. Less apparent is the effect of large landslide dams on river ecosystems and marine sedimentation. Combining analyses of 1-m resolution topographic data (acquired via airborne laser mapping) and field investigation, we present evidence for a large, landslide-dammed paleolake along the Eel River, CA. The landslide mass initiated from a high-relief, resistant outcrop which failed catastrophically, blocking the Eel River with an approximately 130-m-tall dam. Support for the resulting 55-km-long, 1.3-km 3 lake includes subtle shorelines cut into bounding terrain, deltas, and lacustrine sediments radiocarbon dated to 22.5 ka. The landslide provides an explanation for the recent genetic divergence of local anadromous (ocean-run) steelhead trout (Oncorhynchus mykiss) by blocking their migration route and causing gene flow between summer run and winter run reproductive ecotypes. Further, the dam arrested the prodigious flux of sediment down the Eel River; this cessation is recorded in marine sedimentary deposits as a 10-fold reduction in deposition rates of Eel-derived sediment and constitutes a rare example of a terrestrial event transmitted through the dispersal system and recorded offshore.
英文关键词	Erosion; Franciscan mélange; Genetic introgression
语种	英语
scopus关键词	article; ecotype; female; fish; gene flow; genetic variability; lake; landslide; marine environment; migration; nonhuman; priority journal; rainbow trout; river ecosystem; sea; sedimentation; summer; winter; Animal Migration; Animals; California; Ecosystem; Gene Flow; Genetic Variation; Genetics, Population; Geologic Sediments; History, Ancient; Lakes; Landslides; Oncorhynchus mykiss; Paleontology; Water Movements
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/159141
作者单位	Mackey, B.H., Department of Geological Sciences, 1272 University of Oregon, Eugene, OR 97403, United States, Division of Geological and Planetary Sciences, California Institute of Technology, 1200 East California Boulevard, Pasadena, CA 91125, United States; Roering, J.J., Department of Geological Sciences, 1272 University of Oregon, Eugene, OR 97403, United States; Lamb, M.P., Division of Geological and Planetary Sciences, California Institute of Technology, 1200 East California Boulevard, Pasadena, CA 91125, United States
推荐引用方式 GB/T 7714	Mackey B.H.,Roering J.J.,Lamb M.P.. Landslide-dammed paleolake perturbs marine sedimentation and drives genetic change in anadromous fish[J],2011,108(47).
APA	Mackey B.H.,Roering J.J.,&Lamb M.P..(2011).Landslide-dammed paleolake perturbs marine sedimentation and drives genetic change in anadromous fish.Proceedings of the National Academy of Sciences of the United States of America,108(47).
MLA	Mackey B.H.,et al."Landslide-dammed paleolake perturbs marine sedimentation and drives genetic change in anadromous fish".Proceedings of the National Academy of Sciences of the United States of America 108.47(2011).